From c90f36e3dd179d2de96f4f5fe38d8dc9a9de6dfe Mon Sep 17 00:00:00 2001 From: Emile Date: Fri, 25 Oct 2024 15:55:50 +0200 Subject: vendor --- vendor/golang.org/x/sys/unix/syscall_unix.go | 615 +++++++++++++++++++++++++++ 1 file changed, 615 insertions(+) create mode 100644 vendor/golang.org/x/sys/unix/syscall_unix.go (limited to 'vendor/golang.org/x/sys/unix/syscall_unix.go') diff --git a/vendor/golang.org/x/sys/unix/syscall_unix.go b/vendor/golang.org/x/sys/unix/syscall_unix.go new file mode 100644 index 0000000..4e92e5a --- /dev/null +++ b/vendor/golang.org/x/sys/unix/syscall_unix.go @@ -0,0 +1,615 @@ +// Copyright 2009 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris + +package unix + +import ( + "bytes" + "sort" + "sync" + "syscall" + "unsafe" +) + +var ( + Stdin = 0 + Stdout = 1 + Stderr = 2 +) + +// Do the interface allocations only once for common +// Errno values. +var ( + errEAGAIN error = syscall.EAGAIN + errEINVAL error = syscall.EINVAL + errENOENT error = syscall.ENOENT +) + +var ( + signalNameMapOnce sync.Once + signalNameMap map[string]syscall.Signal +) + +// errnoErr returns common boxed Errno values, to prevent +// allocations at runtime. +func errnoErr(e syscall.Errno) error { + switch e { + case 0: + return nil + case EAGAIN: + return errEAGAIN + case EINVAL: + return errEINVAL + case ENOENT: + return errENOENT + } + return e +} + +// ErrnoName returns the error name for error number e. +func ErrnoName(e syscall.Errno) string { + i := sort.Search(len(errorList), func(i int) bool { + return errorList[i].num >= e + }) + if i < len(errorList) && errorList[i].num == e { + return errorList[i].name + } + return "" +} + +// SignalName returns the signal name for signal number s. +func SignalName(s syscall.Signal) string { + i := sort.Search(len(signalList), func(i int) bool { + return signalList[i].num >= s + }) + if i < len(signalList) && signalList[i].num == s { + return signalList[i].name + } + return "" +} + +// SignalNum returns the syscall.Signal for signal named s, +// or 0 if a signal with such name is not found. +// The signal name should start with "SIG". +func SignalNum(s string) syscall.Signal { + signalNameMapOnce.Do(func() { + signalNameMap = make(map[string]syscall.Signal, len(signalList)) + for _, signal := range signalList { + signalNameMap[signal.name] = signal.num + } + }) + return signalNameMap[s] +} + +// clen returns the index of the first NULL byte in n or len(n) if n contains no NULL byte. +func clen(n []byte) int { + i := bytes.IndexByte(n, 0) + if i == -1 { + i = len(n) + } + return i +} + +// Mmap manager, for use by operating system-specific implementations. + +type mmapper struct { + sync.Mutex + active map[*byte][]byte // active mappings; key is last byte in mapping + mmap func(addr, length uintptr, prot, flags, fd int, offset int64) (uintptr, error) + munmap func(addr uintptr, length uintptr) error +} + +func (m *mmapper) Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { + if length <= 0 { + return nil, EINVAL + } + + // Map the requested memory. + addr, errno := m.mmap(0, uintptr(length), prot, flags, fd, offset) + if errno != nil { + return nil, errno + } + + // Use unsafe to convert addr into a []byte. + b := unsafe.Slice((*byte)(unsafe.Pointer(addr)), length) + + // Register mapping in m and return it. + p := &b[cap(b)-1] + m.Lock() + defer m.Unlock() + m.active[p] = b + return b, nil +} + +func (m *mmapper) Munmap(data []byte) (err error) { + if len(data) == 0 || len(data) != cap(data) { + return EINVAL + } + + // Find the base of the mapping. + p := &data[cap(data)-1] + m.Lock() + defer m.Unlock() + b := m.active[p] + if b == nil || &b[0] != &data[0] { + return EINVAL + } + + // Unmap the memory and update m. + if errno := m.munmap(uintptr(unsafe.Pointer(&b[0])), uintptr(len(b))); errno != nil { + return errno + } + delete(m.active, p) + return nil +} + +func Mmap(fd int, offset int64, length int, prot int, flags int) (data []byte, err error) { + return mapper.Mmap(fd, offset, length, prot, flags) +} + +func Munmap(b []byte) (err error) { + return mapper.Munmap(b) +} + +func MmapPtr(fd int, offset int64, addr unsafe.Pointer, length uintptr, prot int, flags int) (ret unsafe.Pointer, err error) { + xaddr, err := mapper.mmap(uintptr(addr), length, prot, flags, fd, offset) + return unsafe.Pointer(xaddr), err +} + +func MunmapPtr(addr unsafe.Pointer, length uintptr) (err error) { + return mapper.munmap(uintptr(addr), length) +} + +func Read(fd int, p []byte) (n int, err error) { + n, err = read(fd, p) + if raceenabled { + if n > 0 { + raceWriteRange(unsafe.Pointer(&p[0]), n) + } + if err == nil { + raceAcquire(unsafe.Pointer(&ioSync)) + } + } + return +} + +func Write(fd int, p []byte) (n int, err error) { + if raceenabled { + raceReleaseMerge(unsafe.Pointer(&ioSync)) + } + n, err = write(fd, p) + if raceenabled && n > 0 { + raceReadRange(unsafe.Pointer(&p[0]), n) + } + return +} + +func Pread(fd int, p []byte, offset int64) (n int, err error) { + n, err = pread(fd, p, offset) + if raceenabled { + if n > 0 { + raceWriteRange(unsafe.Pointer(&p[0]), n) + } + if err == nil { + raceAcquire(unsafe.Pointer(&ioSync)) + } + } + return +} + +func Pwrite(fd int, p []byte, offset int64) (n int, err error) { + if raceenabled { + raceReleaseMerge(unsafe.Pointer(&ioSync)) + } + n, err = pwrite(fd, p, offset) + if raceenabled && n > 0 { + raceReadRange(unsafe.Pointer(&p[0]), n) + } + return +} + +// For testing: clients can set this flag to force +// creation of IPv6 sockets to return EAFNOSUPPORT. +var SocketDisableIPv6 bool + +// Sockaddr represents a socket address. +type Sockaddr interface { + sockaddr() (ptr unsafe.Pointer, len _Socklen, err error) // lowercase; only we can define Sockaddrs +} + +// SockaddrInet4 implements the Sockaddr interface for AF_INET type sockets. +type SockaddrInet4 struct { + Port int + Addr [4]byte + raw RawSockaddrInet4 +} + +// SockaddrInet6 implements the Sockaddr interface for AF_INET6 type sockets. +type SockaddrInet6 struct { + Port int + ZoneId uint32 + Addr [16]byte + raw RawSockaddrInet6 +} + +// SockaddrUnix implements the Sockaddr interface for AF_UNIX type sockets. +type SockaddrUnix struct { + Name string + raw RawSockaddrUnix +} + +func Bind(fd int, sa Sockaddr) (err error) { + ptr, n, err := sa.sockaddr() + if err != nil { + return err + } + return bind(fd, ptr, n) +} + +func Connect(fd int, sa Sockaddr) (err error) { + ptr, n, err := sa.sockaddr() + if err != nil { + return err + } + return connect(fd, ptr, n) +} + +func Getpeername(fd int) (sa Sockaddr, err error) { + var rsa RawSockaddrAny + var len _Socklen = SizeofSockaddrAny + if err = getpeername(fd, &rsa, &len); err != nil { + return + } + return anyToSockaddr(fd, &rsa) +} + +func GetsockoptByte(fd, level, opt int) (value byte, err error) { + var n byte + vallen := _Socklen(1) + err = getsockopt(fd, level, opt, unsafe.Pointer(&n), &vallen) + return n, err +} + +func GetsockoptInt(fd, level, opt int) (value int, err error) { + var n int32 + vallen := _Socklen(4) + err = getsockopt(fd, level, opt, unsafe.Pointer(&n), &vallen) + return int(n), err +} + +func GetsockoptInet4Addr(fd, level, opt int) (value [4]byte, err error) { + vallen := _Socklen(4) + err = getsockopt(fd, level, opt, unsafe.Pointer(&value[0]), &vallen) + return value, err +} + +func GetsockoptIPMreq(fd, level, opt int) (*IPMreq, error) { + var value IPMreq + vallen := _Socklen(SizeofIPMreq) + err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) + return &value, err +} + +func GetsockoptIPv6Mreq(fd, level, opt int) (*IPv6Mreq, error) { + var value IPv6Mreq + vallen := _Socklen(SizeofIPv6Mreq) + err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) + return &value, err +} + +func GetsockoptIPv6MTUInfo(fd, level, opt int) (*IPv6MTUInfo, error) { + var value IPv6MTUInfo + vallen := _Socklen(SizeofIPv6MTUInfo) + err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) + return &value, err +} + +func GetsockoptICMPv6Filter(fd, level, opt int) (*ICMPv6Filter, error) { + var value ICMPv6Filter + vallen := _Socklen(SizeofICMPv6Filter) + err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen) + return &value, err +} + +func GetsockoptLinger(fd, level, opt int) (*Linger, error) { + var linger Linger + vallen := _Socklen(SizeofLinger) + err := getsockopt(fd, level, opt, unsafe.Pointer(&linger), &vallen) + return &linger, err +} + +func GetsockoptTimeval(fd, level, opt int) (*Timeval, error) { + var tv Timeval + vallen := _Socklen(unsafe.Sizeof(tv)) + err := getsockopt(fd, level, opt, unsafe.Pointer(&tv), &vallen) + return &tv, err +} + +func GetsockoptUint64(fd, level, opt int) (value uint64, err error) { + var n uint64 + vallen := _Socklen(8) + err = getsockopt(fd, level, opt, unsafe.Pointer(&n), &vallen) + return n, err +} + +func Recvfrom(fd int, p []byte, flags int) (n int, from Sockaddr, err error) { + var rsa RawSockaddrAny + var len _Socklen = SizeofSockaddrAny + if n, err = recvfrom(fd, p, flags, &rsa, &len); err != nil { + return + } + if rsa.Addr.Family != AF_UNSPEC { + from, err = anyToSockaddr(fd, &rsa) + } + return +} + +// Recvmsg receives a message from a socket using the recvmsg system call. The +// received non-control data will be written to p, and any "out of band" +// control data will be written to oob. The flags are passed to recvmsg. +// +// The results are: +// - n is the number of non-control data bytes read into p +// - oobn is the number of control data bytes read into oob; this may be interpreted using [ParseSocketControlMessage] +// - recvflags is flags returned by recvmsg +// - from is the address of the sender +// +// If the underlying socket type is not SOCK_DGRAM, a received message +// containing oob data and a single '\0' of non-control data is treated as if +// the message contained only control data, i.e. n will be zero on return. +func Recvmsg(fd int, p, oob []byte, flags int) (n, oobn int, recvflags int, from Sockaddr, err error) { + var iov [1]Iovec + if len(p) > 0 { + iov[0].Base = &p[0] + iov[0].SetLen(len(p)) + } + var rsa RawSockaddrAny + n, oobn, recvflags, err = recvmsgRaw(fd, iov[:], oob, flags, &rsa) + // source address is only specified if the socket is unconnected + if rsa.Addr.Family != AF_UNSPEC { + from, err = anyToSockaddr(fd, &rsa) + } + return +} + +// RecvmsgBuffers receives a message from a socket using the recvmsg system +// call. This function is equivalent to Recvmsg, but non-control data read is +// scattered into the buffers slices. +func RecvmsgBuffers(fd int, buffers [][]byte, oob []byte, flags int) (n, oobn int, recvflags int, from Sockaddr, err error) { + iov := make([]Iovec, len(buffers)) + for i := range buffers { + if len(buffers[i]) > 0 { + iov[i].Base = &buffers[i][0] + iov[i].SetLen(len(buffers[i])) + } else { + iov[i].Base = (*byte)(unsafe.Pointer(&_zero)) + } + } + var rsa RawSockaddrAny + n, oobn, recvflags, err = recvmsgRaw(fd, iov, oob, flags, &rsa) + if err == nil && rsa.Addr.Family != AF_UNSPEC { + from, err = anyToSockaddr(fd, &rsa) + } + return +} + +// Sendmsg sends a message on a socket to an address using the sendmsg system +// call. This function is equivalent to SendmsgN, but does not return the +// number of bytes actually sent. +func Sendmsg(fd int, p, oob []byte, to Sockaddr, flags int) (err error) { + _, err = SendmsgN(fd, p, oob, to, flags) + return +} + +// SendmsgN sends a message on a socket to an address using the sendmsg system +// call. p contains the non-control data to send, and oob contains the "out of +// band" control data. The flags are passed to sendmsg. The number of +// non-control bytes actually written to the socket is returned. +// +// Some socket types do not support sending control data without accompanying +// non-control data. If p is empty, and oob contains control data, and the +// underlying socket type is not SOCK_DGRAM, p will be treated as containing a +// single '\0' and the return value will indicate zero bytes sent. +// +// The Go function Recvmsg, if called with an empty p and a non-empty oob, +// will read and ignore this additional '\0'. If the message is received by +// code that does not use Recvmsg, or that does not use Go at all, that code +// will need to be written to expect and ignore the additional '\0'. +// +// If you need to send non-empty oob with p actually empty, and if the +// underlying socket type supports it, you can do so via a raw system call as +// follows: +// +// msg := &unix.Msghdr{ +// Control: &oob[0], +// } +// msg.SetControllen(len(oob)) +// n, _, errno := unix.Syscall(unix.SYS_SENDMSG, uintptr(fd), uintptr(unsafe.Pointer(msg)), flags) +func SendmsgN(fd int, p, oob []byte, to Sockaddr, flags int) (n int, err error) { + var iov [1]Iovec + if len(p) > 0 { + iov[0].Base = &p[0] + iov[0].SetLen(len(p)) + } + var ptr unsafe.Pointer + var salen _Socklen + if to != nil { + ptr, salen, err = to.sockaddr() + if err != nil { + return 0, err + } + } + return sendmsgN(fd, iov[:], oob, ptr, salen, flags) +} + +// SendmsgBuffers sends a message on a socket to an address using the sendmsg +// system call. This function is equivalent to SendmsgN, but the non-control +// data is gathered from buffers. +func SendmsgBuffers(fd int, buffers [][]byte, oob []byte, to Sockaddr, flags int) (n int, err error) { + iov := make([]Iovec, len(buffers)) + for i := range buffers { + if len(buffers[i]) > 0 { + iov[i].Base = &buffers[i][0] + iov[i].SetLen(len(buffers[i])) + } else { + iov[i].Base = (*byte)(unsafe.Pointer(&_zero)) + } + } + var ptr unsafe.Pointer + var salen _Socklen + if to != nil { + ptr, salen, err = to.sockaddr() + if err != nil { + return 0, err + } + } + return sendmsgN(fd, iov, oob, ptr, salen, flags) +} + +func Send(s int, buf []byte, flags int) (err error) { + return sendto(s, buf, flags, nil, 0) +} + +func Sendto(fd int, p []byte, flags int, to Sockaddr) (err error) { + var ptr unsafe.Pointer + var salen _Socklen + if to != nil { + ptr, salen, err = to.sockaddr() + if err != nil { + return err + } + } + return sendto(fd, p, flags, ptr, salen) +} + +func SetsockoptByte(fd, level, opt int, value byte) (err error) { + return setsockopt(fd, level, opt, unsafe.Pointer(&value), 1) +} + +func SetsockoptInt(fd, level, opt int, value int) (err error) { + var n = int32(value) + return setsockopt(fd, level, opt, unsafe.Pointer(&n), 4) +} + +func SetsockoptInet4Addr(fd, level, opt int, value [4]byte) (err error) { + return setsockopt(fd, level, opt, unsafe.Pointer(&value[0]), 4) +} + +func SetsockoptIPMreq(fd, level, opt int, mreq *IPMreq) (err error) { + return setsockopt(fd, level, opt, unsafe.Pointer(mreq), SizeofIPMreq) +} + +func SetsockoptIPv6Mreq(fd, level, opt int, mreq *IPv6Mreq) (err error) { + return setsockopt(fd, level, opt, unsafe.Pointer(mreq), SizeofIPv6Mreq) +} + +func SetsockoptICMPv6Filter(fd, level, opt int, filter *ICMPv6Filter) error { + return setsockopt(fd, level, opt, unsafe.Pointer(filter), SizeofICMPv6Filter) +} + +func SetsockoptLinger(fd, level, opt int, l *Linger) (err error) { + return setsockopt(fd, level, opt, unsafe.Pointer(l), SizeofLinger) +} + +func SetsockoptString(fd, level, opt int, s string) (err error) { + var p unsafe.Pointer + if len(s) > 0 { + p = unsafe.Pointer(&[]byte(s)[0]) + } + return setsockopt(fd, level, opt, p, uintptr(len(s))) +} + +func SetsockoptTimeval(fd, level, opt int, tv *Timeval) (err error) { + return setsockopt(fd, level, opt, unsafe.Pointer(tv), unsafe.Sizeof(*tv)) +} + +func SetsockoptUint64(fd, level, opt int, value uint64) (err error) { + return setsockopt(fd, level, opt, unsafe.Pointer(&value), 8) +} + +func Socket(domain, typ, proto int) (fd int, err error) { + if domain == AF_INET6 && SocketDisableIPv6 { + return -1, EAFNOSUPPORT + } + fd, err = socket(domain, typ, proto) + return +} + +func Socketpair(domain, typ, proto int) (fd [2]int, err error) { + var fdx [2]int32 + err = socketpair(domain, typ, proto, &fdx) + if err == nil { + fd[0] = int(fdx[0]) + fd[1] = int(fdx[1]) + } + return +} + +var ioSync int64 + +func CloseOnExec(fd int) { fcntl(fd, F_SETFD, FD_CLOEXEC) } + +func SetNonblock(fd int, nonblocking bool) (err error) { + flag, err := fcntl(fd, F_GETFL, 0) + if err != nil { + return err + } + if (flag&O_NONBLOCK != 0) == nonblocking { + return nil + } + if nonblocking { + flag |= O_NONBLOCK + } else { + flag &= ^O_NONBLOCK + } + _, err = fcntl(fd, F_SETFL, flag) + return err +} + +// Exec calls execve(2), which replaces the calling executable in the process +// tree. argv0 should be the full path to an executable ("/bin/ls") and the +// executable name should also be the first argument in argv (["ls", "-l"]). +// envv are the environment variables that should be passed to the new +// process (["USER=go", "PWD=/tmp"]). +func Exec(argv0 string, argv []string, envv []string) error { + return syscall.Exec(argv0, argv, envv) +} + +// Lutimes sets the access and modification times tv on path. If path refers to +// a symlink, it is not dereferenced and the timestamps are set on the symlink. +// If tv is nil, the access and modification times are set to the current time. +// Otherwise tv must contain exactly 2 elements, with access time as the first +// element and modification time as the second element. +func Lutimes(path string, tv []Timeval) error { + if tv == nil { + return UtimesNanoAt(AT_FDCWD, path, nil, AT_SYMLINK_NOFOLLOW) + } + if len(tv) != 2 { + return EINVAL + } + ts := []Timespec{ + NsecToTimespec(TimevalToNsec(tv[0])), + NsecToTimespec(TimevalToNsec(tv[1])), + } + return UtimesNanoAt(AT_FDCWD, path, ts, AT_SYMLINK_NOFOLLOW) +} + +// emptyIovecs reports whether there are no bytes in the slice of Iovec. +func emptyIovecs(iov []Iovec) bool { + for i := range iov { + if iov[i].Len > 0 { + return false + } + } + return true +} + +// Setrlimit sets a resource limit. +func Setrlimit(resource int, rlim *Rlimit) error { + // Just call the syscall version, because as of Go 1.21 + // it will affect starting a new process. + return syscall.Setrlimit(resource, (*syscall.Rlimit)(rlim)) +} -- cgit 1.4.1